Well, Whadya Know

Why do we sometimes call someone with below average intelligence a moron?

Moron was a word coined in 1910. It seems that psychologists, never happy unless they can stick a label on someone, felt they needed a new word to describe people who were quite slow on the uptake. So, in that year, at the convention of The American Association for the Study of the Feeble Minded ("moron" did symbolize progress), the delegates went to work. Someone remembered that the French dramatist, Moliere, had written a play in which a stupid character was named Moron (ancient Greek for stupid was "moros"). Voila! Everyone went home happy.

[source: Why You Say It by Webb Garrison]

Why can't you buy cashew nuts in the shell?

Cashews have no shells. What's more, they're not nuts. The cashew is a seed, just like sunflower and pumpkin seeds. They grow on shrubs and hang from cashew apples, which also taste pretty good. Anyone who tells you otherwise IS a nut.

[source: Imponderables: The Solution To The Mystery Of Everyday Life by David Feldman]